3191398723 has 2 divisors, whose sum is σ = 3191398724. Its totient is φ = 3191398722.

The previous prime is 3191398711. The next prime is 3191398781. The reversal of 3191398723 is 3278931913.

3191398723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (3278931913) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3191398723 - 2²¹ = 3189301571 is a prime.

It is not a weakly prime, because it can be changed into another prime (3191390723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1595699361 + 1595699362.

It is an arithmetic number, because the mean of its divisors is an integer number (1595699362).

Almost surely, 2^3191398723 is an apocalyptic number.

3191398723 is a deficient number, since it is larger than the sum of its proper divisors (1).

3191398723 is an equidigital number, since it uses as much as digits as its factorization.

3191398723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 46.

The square root of 3191398723 is about 56492.4660729198. The cubic root of 3191398723 is about 1472.2911074274.

The spelling of 3191398723 in words is "three billion, one hundred ninety-one million, three hundred ninety-eight thousand, seven hundred twenty-three".